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1/((log)(sqrt(b c))a b c)+1/((log)(sqrt(...

`1/((log)_(sqrt(b c))a b c)+1/((log)_(sqrt(c a))a b c)+1/((log)_(sqrt(a b))a b c)` has the value of equal to: a.`1//2` b. `1` c.`2` d. `4`

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